diff --git a/.github/workflows/backend.yml b/.github/workflows/backend.yml
index f6476917b2b..7ae9842c9ed 100644
--- a/.github/workflows/backend.yml
+++ b/.github/workflows/backend.yml
@@ -18,6 +18,8 @@
 name: Backend
 on:
   push:
+    branches:
+      - dev
   pull_request:
     paths-ignore:
       - 'docs/**'
@@ -657,4 +659,4 @@ jobs:
         run: |
           ./mvnw -T 1C -B verify -DskipUT=true -DskipIT=false -D"license.skipAddThirdParty"=true --no-snapshot-updates -pl :connector-jdbc-e2e-part-3 -am -Pci
         env:
-          MAVEN_OPTS: -Xmx4096m
\ No newline at end of file
+          MAVEN_OPTS: -Xmx4096m
diff --git a/.github/workflows/codeql.yaml b/.github/workflows/codeql.yaml
index 86a0dc9dc4b..dc13cd9add0 100644
--- a/.github/workflows/codeql.yaml
+++ b/.github/workflows/codeql.yaml
@@ -17,7 +17,7 @@ name: "CodeQL"
 
 on:
   schedule:
-    - cron: '0 0 12 * * ?'
+    - cron: '0 0 12 * *'
 
 jobs:
   analyze:
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
deleted file mode 100644
index b1354cb4871..00000000000
--- a/.github/workflows/docker.yml
+++ /dev/null
@@ -1,54 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-name: Test Docker Images
-
-on:
-  schedule:
-    - cron: '0 0 12 * * ?'
-
-jobs:
-  check:
-    name: Spark
-    runs-on: ubuntu-latest
-    timeout-minutes: 60
-    steps:
-      - uses: actions/checkout@v2
-      - name: Set up JDK 1.8
-        uses: actions/setup-java@v2
-        with:
-          java-version:  8
-          distribution: 'adopt'
-      - name: Cache local Maven repository
-        uses: actions/cache@v2
-        with:
-          path: ~/.m2/repository
-          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
-          restore-keys: |
-            ${{ runner.os }}-maven-
-      - name: Build and Package
-        run: |
-          ./mvnw -B package \
-                 -Dmaven.test.skip=true \
-                 -Dlicense.skipAddThirdParty=true \
-                 -Dhttp.keepAlive=false \
-                 -Dmaven.wagon.http.pool=false \
-                 -Dmaven.wagon.httpconnectionManager.ttlSeconds=120 \
-                 -Pdocker \
-                 --no-snapshot-updates
-      - name: Sanity Check Docker Images
-        run: docker-compose -f deploy/docker/spark/docker-compose.yaml up
diff --git a/.github/workflows/schedule_backend.yml b/.github/workflows/schedule_backend.yml
index d78d2dc570a..bb9bf6e82d7 100644
--- a/.github/workflows/schedule_backend.yml
+++ b/.github/workflows/schedule_backend.yml
@@ -18,7 +18,7 @@
 name: Schedule Backend
 on:
   schedule:
-    - cron: '0 0 03 * * ?'
+    - cron: '0 0 03 * *'
 
 concurrency:
   group: backend-${{ github.event.pull_request.number || github.ref }}